package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageBean;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.service.SetmealService;
import com.sky.vo.DishVO;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.ArrayList;
import java.util.List;

import static org.apache.xmlbeans.impl.store.Public2.save;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealService setmealService;

    /**
     * 新增菜品
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值s
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     *
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageBean pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageBean(page.getTotal(), page.getResult());
    }

    /**
     * 菜品批量删除
     *
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            //起售中不能删除
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

            //判断当前菜品是否能够删除---是否被套餐关联了？？
            List<Long> setMealIds = setmealDishMapper.getSetmealIdsByDishId(id);
            if (setMealIds != null && setMealIds.size() > 0) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }

            //删除菜品
            dishMapper.deleteById(id);
            //删除菜品关联的口味
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    /**
     * 根据id查询菜品
     *
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    /**
     * 修改菜品
     *
     * @param dishDTO
     */
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表
        dishMapper.update(dish);

        //删除原有的菜品口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新添加新口味
        List<DishFlavor> dishFlavors = dishDTO.getFlavors();
        if (dishFlavors != null && dishFlavors.size() > 0) {
            dishFlavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });

            //插入n条数据
            dishFlavorMapper.insertBatch(dishFlavors);
        }
    }

    /**
     * 根据分类id查菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> queryByCategoryId(Long categoryId) {
        return dishFlavorMapper.getByCategoryId(categoryId);
    }

    /**
     * 菜品起售、停售
     *
     * @param status
     * @param id
     */
    @Override
    @Transactional
    public void updateStatus(Integer status, Long id) {
        Dish dish= dishMapper.getById(id);
        dish.setStatus(status);
        dishMapper.update(dish);
        //相关套餐的状态也要改变
        if(status.equals(StatusConstant.DISABLE)){
            List<Long> setmealsIds = setmealDishMapper.getSetmealIdsByDishId(id);
            setmealsIds.forEach(setmealsId->{
                setmealService.updateStatus(status,setmealsId);
            });
        }
    }

    /**
     * 条件查询菜品和口味
     *
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
